Handle sorting with "undefined" (move always to bottom)

[spacegaier]

Breaking change

Proposed change

Ensure sorting does not break if a column value is undefined. Those entries are now always sorted to the bottom regardless of whether we are in asc or desc mode. Previously the sorting did not work since we e.g. compared string with NaN.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New feature (thank you!)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Example configuration

Additional information

• This PR fixes or closes issue: fixes Sorting by area is mixed up, not working #7984
• This PR is related to issue or discussion:
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
• There is no commented out code in this PR.
• Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io